# Benchmarks

> Independent Supabase ETL performance results, tested versions, and plans for future benchmarks.

- Canonical HTML: https://supabase.github.io/etl/reference/benchmarks/
- Agent-readable Markdown: https://supabase.github.io/etl/reference/benchmarks.md
- Source: https://github.com/supabase/etl/blob/main/site/content/docs/reference/benchmarks.mdx

## Independent benchmark [#independent-benchmark]

Hardbyte's independent CDC benchmarks compare six configurations across
steady-state delivery, mixed-speed consumers, and consumer outages.

The table shows **selected results from separate benchmark scenarios**, with
all six configurations included. Each metric heading links to
its source table. **Bold numbers mark the lowest reported value in each column,
including ties at the published precision.**

| CDC configuration            | [Fast-consumer tail latency](https://github.com/hardbyte/postgresql-job-queue-benchmarking/blob/7b2919a0fd668a84efc68500ac94cfbfbd3b7356/results/cdc-sweep-long/REPORT.md#fanout_steady) | [Fast-consumer memory](https://github.com/hardbyte/postgresql-job-queue-benchmarking/blob/7b2919a0fd668a84efc68500ac94cfbfbd3b7356/results/cdc-sweep-long/REPORT.md#fanout_steady) | [Mixed-speed tail latency](https://github.com/hardbyte/postgresql-job-queue-benchmarking/blob/7b2919a0fd668a84efc68500ac94cfbfbd3b7356/results/cdc-sweep-hetero/REPORT.md#fanout_steady) | [Source slot WAL during outage](https://github.com/hardbyte/postgresql-job-queue-benchmarking/blob/7b2919a0fd668a84efc68500ac94cfbfbd3b7356/results/cdc-sweep-long/REPORT.md#dead_consumer) |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| **Supabase ETL**             |                                                                                                                                                                                **26 ms** |                                                                                                                                                                        **13.0 MB** |                                                                                                                                                                                   273 ms |                                                                                                                                                                                     57.2 MB |
| Debezium + Kafka             |                                                                                                                                                                                   961 ms |                                                                                                                                                                         1,385.4 MB |                                                                                                                                                                                 1,074 ms |                                                                                                                                                                                 **11.0 MB** |
| Debezium Server              |                                                                                                                                                                                   848 ms |                                                                                                                                                                         1,629.3 MB |                                                                                                                                                                                 1,181 ms |                                                                                                                                                                                     57.3 MB |
| Raw pgoutput (SQL polling)   |                                                                                                                                                                                    70 ms |                                                                                                                                                                            59.7 MB |                                                                                                                                                                                   267 ms |                                                                                                                                                                                     56.6 MB |
| Sequin                       |                                                                                                                                                                                    33 ms |                                                                                                                                                                           595.2 MB |                                                                                                                                                                                **33 ms** |                                                                                                                                                                                    642.0 MB |
| Sequin with message grouping |                                                                                                                                                                                    33 ms |                                                                                                                                                                           624.3 MB |                                                                                                                                                                                **33 ms** |                                                                                                                                                                                    679.9 MB |

For methodology, tested versions, configurations, and complete results, see
[Hardbyte's benchmark repository](https://github.com/hardbyte/postgresql-job-queue-benchmarking/tree/7b2919a0fd668a84efc68500ac94cfbfbd3b7356).

> Performance differences may also reflect configuration, workload, and deployment
> choices, rather than the CDC tools alone.

## Our own benchmarks [#our-own-benchmarks]

We plan to run and publish our own benchmarks as Supabase ETL matures and
product stability improves.